Limud Hebrew

What would you recommend someone who wants to learn Torah,Mishna,Gemara and the Sages of the past up to this day but cant read Biblical Hebrew?

Any advice or tips on how to learn the language?

The Great Courses has a series on Biblical Hebrew. But Biblical Hebrew, Aramaic of the Targum, Mishnaic Hebrew, Talmudic Aramaic, the Hebrew of the Rishonim, and Modern Hebrew are all different from one another, some moreso than others.